Control unit for heating system

ABSTRACT

The design is the features of shape, configuration, pattern and ornament of a control unit for the heating system or the like as shown in the drawings.

FIG. 1 is a perspective view from in front and the right of theinvention, the not shown left side being identical to but a mirror imageof the visible right side;

FIG. 2 is a front elevational view of the invention; and,

FIG. 3 is a bottom view of the invention, the back side of the inventionbeing disclaimed.

The ornamental design for a control unit for heating system, as shown and described. 